INFO: task syz.7.693:12642 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.693       state:D stack:25128 pid:12642 tgid:12641 ppid:11239  task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x4da/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4452d8ec29
RSP: 002b:00007f4453cd9038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f4452fd5fa0 RCX: 00007f4452d8ec29
RDX: 0000000000000000 RSI: 0000200000000040 RDI: ffffffff80000701
RBP: 00007f4452e11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4452fd6038 R14: 00007f4452fd5fa0 R15: 00007ffed8ab3ac8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13a0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5676:
 #0: ffff8880219b10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
2 locks held by syz-executor/8907:
1 lock held by syz.7.693/12642:
 #0: ffff88803cd820e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.2.1007/15624:
 #0: ffff88803cd820e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz.5.1016/15671:
2 locks held by dhcpcd/15693:
 #0: ffff888107d72258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcd0
 #1: ffffffff8e13fb78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 15660 Comm: syz.9.1013 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:memchr+0x3d/0x80
Code: bf 00 00 00 00 00 fc ff df 48 83 ea 01 72 42 48 89 f8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 12 49 8d 46 01 48 ff c7 41 38 76 01 <49> 89 c6 75 da eb 22 89 f9 80 e1 07 38 c1 7c e5 48 89 fb 49 89 d4
RSP: 0018:ffffc90003c0f130 EFLAGS: 00000216
RAX: ffffffff99b028ce RBX: 0000000000000017 RCX: ffff88802e8c5640
RDX: 000000000000000b RSI: 000000000000000a RDI: ffffffff99b028cf
RBP: ffffc90003c0f290 R08: ffffc90003c0f1f5 R09: 1ffff92000781e3e
R10: dffffc0000000000 R11: fffff52000781e3f R12: ffffc90003c0f1e0
R13: ffffffff99b028c0 R14: ffffffff99b028cd R15: dffffc0000000000
FS:  00007f48fc0cf6c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc1e67b388 CR3: 00000000397a8000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 record_print_text+0x1a0/0x420
 printk_get_next_message+0x26d/0x7b0
 console_flush_all+0x4ca/0xc40
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 __mlog_printk+0x25e/0x290
 ocfs2_check_set_options+0x310/0x5f0
 ocfs2_reconfigure+0x14b/0xb90
 reconfigure_super+0x227/0x890
 path_mount+0xd18/0xfe0
 __se_sys_mount+0x317/0x410
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f48fb1903ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f48fc0cee68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f48fc0ceef0 RCX: 00007f48fb1903ca
RDX: 0000200000000000 RSI: 0000200000000100 RDI: 0000000000000000
RBP: 0000200000000000 R08: 00007f48fc0ceef0 R09: 0000000000010820
R10: 0000000000010820 R11: 0000000000000246 R12: 0000200000000100
R13: 00007f48fc0ceeb0 R14: 0000000000000000 R15: 00002000000009c0
 </TASK>
